html, body, div, a, span, p, b, ul, li, img, input {
    margin: 0;
    padding: 0;
    color: #666;
}

img {
    vertical-align: middle;
}

ul, li {
    list-style-type: none;
}

.lf {
    float: left;
}

.rf {
    float: right;
}

.cf {
    clear: both;
}